How to order 1. Type of magnet and Grade 2. Dimenion of MagnetIf possible, it's better to send us a drawing or sketches. 3.Tolerance of Magnet 4.Quantity 5. Direction of Magnetization 6. In case, you have no idea about the grade and surface coating, please tell us the following information: 6 -1.What's the product used for ? 6-2..Operating temperature and environment (dry. Humit, salt or others )